gullible

adjectives

naive and easily deceived or tricked
"at that early age she had been gullible and in love"
fleeceable, green, gullible
is derived from
gullibility
easily tricked because of being too trusting
"gullible tourists taken in by the shell game"
gullible
is derived from
gullibility
is similar to
not alert to danger or deception
"the shrieks of unwary animals taken by surprise"; "some thieves prey especially on unwary travelers"; "seduce the unwary reader into easy acquiescence"- O.J.Campbell
unwary